Mercola argues sun exposure is the best route to adequate vitamin D, with a safe tanning bed next and oral D3 a last resort, citing GrassrootsHealth data that the average adult needs 8,000 IU a day to clear 40 ng/ml on a 25(OH)D test.
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Vitamins
Research on vitamins A through K, deficiencies and supplementation.
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Vitamins
Niacin Does Not Reduce Heart Attack, Stroke Risk in Stable, Cardiovascular Patients Whose Cholesterol is Well-Controlled to Treatment Guidelines (PR)
The AIM-HIGH trial found that adding high-dose extended-release niacin gave no further benefit to patients with atherosclerotic heart disease whose LDL was already well controlled on statins. Boden presented the results at the AHA meeting and in NEJM.
Vitamins
Vitamin E may boost risk of prostate cancer
In a trial of 35,533 men followed 7 to 12 years, those given 400 IU of vitamin E daily were 17 percent more likely to develop prostate cancer; selenium alone was linked to a 9 percent increase. The trial tested one form of vitamin E, not all of them.
Vitamins
Vitamin C, E cut breast cancer recurrence and death risk
Among 2,264 breast cancer patients in the Life After Cancer Epidemiology cohort, frequent vitamin C and E use was linked to roughly 30% lower odds of recurrence and of death from any cause, while frequent use of combination carotenoids was tied to higher mortality.
Vitamins
Do You Supplement with Vitamin D? Please Remember This...
Mercola highlights a Diabetes Care study in which vitamin K2 supplements raised insulin sensitivity in healthy young men, an effect that seemed tied to increased carboxylated osteocalcin. Most people, he notes, get only enough vitamin K to maintain normal blood clotting.
Vitamins
Scientists find vitamin D crucial in human immune response to TB (PR)
A UCLA-led team reports in Science Translational Medicine that vitamin D is needed for both innate and adaptive immune responses against the bacteria that cause tuberculosis. The researchers suggest melanin-rich skin, which makes less vitamin D, may partly explain higher susceptibility.
Vitamins
Use of vitamin E associated with increased risk of prostate cancer (PR)
In SELECT, a trial of 35,533 men, those randomized to daily vitamin E supplements had a significantly increased risk of prostate cancer, JAMA reports. The trial's first report had found no risk reduction from vitamin E or selenium and a statistically nonsignificant rise with vitamin E.
Vitamins
The Wonder Vitamin That May Help You Prevent 16 Types of Cancer
Dr. Mercola interviews Carole Baggerly of GrassrootsHealth, who took up vitamin D research after her 2005 breast cancer diagnosis. He argues serum levels of 50 to 70 ng/ml could help prevent at least 16 types of cancer, citing over 200 epidemiological studies.
Vitamins
Vitamin D deficiency linked with airway changes in children with severe asthma (PR)
London researchers report in the American Journal of Respiratory and Critical Care Medicine that children with severe therapy-resistant asthma who have low vitamin D show poorer lung function, worse symptoms, more medication use and greater airway smooth muscle mass.
Vitamins
Vitamin C, vitamin D may help fight lung cancer
Taiwanese researchers implanted Lewis lung carcinoma in mice, then injected vitamin C and vitamin D combinations twice weekly for 28 days. They report dose-dependent suppression of tumour growth and spread, normalised body weight and lower plasma metalloproteinase activity.
Vitamins
Why Did Our Ancestors Have Over 500% More Antioxidants than We Do?
Drawing on Boyd Eaton's work, Mercola writes that our ancestors' diet was about 50 percent fruits and vegetables against 13 percent today, and that ancient fruits were smaller and more skin-heavy, so richer in antioxidants. Cereal grains have since displaced much of that intake.
Vitamins
Low Level of this Vitamin Found to be Linked to Early Menstruation
Among 242 girls aged 5 to 12, those deficient in vitamin D were twice as likely to begin menstruating during the study period as girls with higher levels, 57% against 23%, University of Michigan researchers found. The average age of a first period has fallen from about 15 to about 12.
Vitamins
Taking extremely high doses of vitamin D doesn't prevent falls and fractures in women
In a trial of 2,256 women averaging 76 years old, those given a single large oral dose of vitamin D3 each fall or winter were 15 percent more likely to fall and 26 percent more likely to fracture a bone than the placebo group, with the fall rate highest in the first three months.
Vitamins
Prenatal lipotropes cut risk of breast cancer in offspring
Female rats whose mothers got methyl nutrients - methionine, choline, folate and vitamin B12 - before and after birth had fewer tumors, smaller tumor volume and longer survival after exposure to a carcinogen. The same nutrients slowed human breast cancer cells in culture.
Vitamins
Vitamin D reduces risk of breast cancer
A review of 11 case-control studies in Anticancer Research found women in the highest quartile of serum vitamin D were 39 percent less likely to be diagnosed with breast cancer than those in the lowest, and women at 47 ng/ml of 25-hydroxyvitamin D were 50 percent less likely.
Vitamins
No cure for Alzheimer's disease? Try vitamin C!
A Journal of Biological Chemistry study of brain tissue from mice with Alzheimer's found vitamin C dissolved the toxic misfolded protein aggregates, as did dehydroascorbic acid, its oxidized form. The work was done on tissue in the lab, not in people.
Vitamins
Low intake of vitamin k1 linked high risk for hip fractures
Among 2,807 Norwegians aged 71 to 75, those in the lowest quartile of vitamin K1 intake were 57 percent more likely to suffer a hip fracture. Vitamin K2 showed no link. K1 comes mainly from green leafy vegetables and some vegetable oils.
Vitamins
Vitamin D linked to early menarche
Among 242 Colombian girls followed for 30 months, 57 percent of those deficient in vitamin D had reached menarche, against 23 percent of girls with sufficient levels. Deficient girls started about 0.8 years earlier and were twice as likely to have menarche early after adjustment.
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